Sewing-machine



(No Model.) 2 Sheets-Sheet 1. P. DIEHL. SEWING MACHINE.

N0. 465,557. Patented Dec. 22, 1891.

V |NVENITEIR jaazz' zaeiw (No Model.) 2 SheetsSheet 2.

' P. DIEHL.

SEWING MACHINE.

N0 465,557. Patented Dec. 22,1891.

UNiTnn I STATES PATENT OFFICE,

PHILIP DIEI-IL, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY OF NElV JERSEY.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 465,557, dated December 22, 1891.

Application filed December 2'7, 1887. fierial No. 259,025. (No model.)

To all whom, it may CON/06PM.

Be it known that I, PHILIP DIEHL, of Elizabeth, county of Union, State of New Jersey, have invented an Improvement in Sewing- Machines, of which the following description, in connection with the accompanying drawings, is a specification,like letters and figures on the drawings representing like parts.

This invention is an improvement on that described in United States Patent No. 374,661, granted to me on the 13th day of December, 1887, to which reference may be had.

The object of my invention is to improve the shuttle and the means for controlling the shuttle-thread in the formation of the stitch.

In my present invention the shuttle which passes through the loop of the needle-thread has been provided with a take-up which is directly connected to the shuttle and which in its movement acts upon the sh uttle-thread, extending from the tension device of the bobbin-case to the under side of the work, the said take-up acting upon the shuttle-thread as the shuttle is moving backward, and while the needle is about at its highest point and the take-up for the needle-thread is finishing the stitch, the feed also at such time being up and making its forward movement. The take-up co-operates with a bridge secured to the shuttle-race or to some suitable fixed part of the frame, and the edge of the take-up and of the bridge are, as shown, of such shape as to bend or crimp the shuttle-thread between them when the slack in the said thread is to be taken up in finishingthe stitch, bending the said shuttle-thread, as described, and increasing the extent to which the said shuttlethread may be drawn. The bobbin-case has been provided with a tension device located thereon at the center of rotation of the bobbin, and, as herein shown, the tension -adjusting screw is extended into the end of the post or stud erected on the shuttle to hold the bobbin-case. The driver for moving the shuttle in its race has been improved by providing it with a threadguard, which is extended backwardly in a direction opposite to the point of the shuttle, the said thread-guard being interposed between the shuttle-thread and the point of the shuttle as the latter arrives in position to enter the loop of needlethread, the end of the said thread-guard being bent inwardly or made cam shape to act against and deflect outwardly the shuttlethread should its slack portion be across the needle-hole at the under side'of the usual throat-plate when the shuttle is moved fully back.

Figure 1 represents a sufficient portion of a sewing-machine to enable my invention to be understood, the said figure showing the throat-plate removed, the feed-bar broken oif, and the overhanging arm and head broken away all except the needle-bar, the tension mechanism for the shuttle being also partially broken out to better show the construction thereof. Fig. 2 in front elevation shows the shuttle-race and the driver and shuttle. Fig. 3 is avertical section in the line a, Fig. 1, on a larger scale, the said figure by dotted lines showing the shuttle-thread between thebridge which co-operates with the take-up carried by the shuttle. Fig. l shows the shuttle and bobbin-case within it, the dotted lines showing the shuttle-thread; Fig. 5, a top View of the parts shown in Fig. 4:. Fig. 6 shows the shuttle-driver detached. Fig. 7 shows in detail the spring and two plates constituting the tension mechanism for the shuttle -thread. Fig. 8 shows the feed-bar detached. Fig. 9, on a smaller scale, shows the front of the head of the machine broken off from Fig. 1. Fig. 10 shows the shuttle in edge view; Fig. 11, a view of the take-up device of the shuttle removed. Fig. 12 is a perspective view of the bobbin-case, and Fig. 13 is a perspective view of the shuttle.

The bed-plate A, the head (see Fig. 9) of the overhanging arm B, the take-up T for the needle-thread, the presser-bar P, the needlebar h, its attached needle n, the shaft D, carrying at its front end the shuttle-driver II, and the feed-bar K, (shown partially in Fig. 1 and fully in Fig. 8,) the shuttle S, having the arm b the beak b, the loop-discharger b the stud b the bobbin m for the under thread, and the bobbin-case g are all substantially as in my said patent, where the like parts are shown' by like letters, except that the driver has at its end next the beak of the shuttle a thread-guard, and that the face of the bobbin-case has been somewhat changed in shape, as will be hereinafter described, and in practice the said parts will all be operated as described in the said paten t-.

The shuttle-race herein shown is composed of a plate a. (Represented detached in Fig. 2.) This race is grooved at its rear side, as shown by the section, Fig. 3, and is attached to lugs at the under side of the bed-plate by screws, as a The rear side of the shuttle-race plate at or about its lower edge has secured to it, preferably, as in United States Patent No. 274,359, a yielding back plate or; but instead of this particular back plate I may employ any other equivalent back plate. The shuttie-race at its upper end, just below the usual throat-plate, (not herein shown,) has secured to or formed as part of itabridge d, the attachment, asshown, being by screws 01. (See Fig. 1.) The bridge d (shown in section in Fig. 3) is grooved longitudinally for the passage through it of the take-up 6, shown as a separate plate attached by screw 6 or in other suitable manner directly to and moving with the shuttle S through the loop, the said takeup acting against the sh uttle-thread extended from the tension device of the bobbin-case to the work as the shuttle is returning to its starting-point, the take-up at such time ben ding or corrugating rather sharply the shuttle- .thread between it and the two lips at the sides of the groove in the bridge, as shown by dotted lines, Fig. 3. At the time that the take-up 6 acts on the shuttle-thread the stitch is being finished or set, and at such time the needle-bar will be at the upper end of its stroke, and the take-up T for the needlethread will be in about its highest position, and the feed-bar K will be elevated and on its forward journey. This take-up e also, it will be understood, will meet the shuttlethread as the shuttle is being passed through the loop of needle-thread; but at such time the feed-bar will be down and in the lowest position of the feed, and the shuttle-thread between the bobbin-case and material will be slack. The shuttle is started forward when the feed-bar is down, as stated, and the shuttle-thread slack, and to prevent the slack of the shuttle-thread getting across the path of the needle or in the path of the point of the shuttle I have provided the driver l-I, attached to the oscillating shaft D, common to my said patent, No. 374,661, with a rearwardly-extended thread-guard h, the outer end of which is bent inwardly, as at h. This thread-guard as the shuttle passes into its backward position, ready to be again moved forward to enter a loop of needle-thread, passes between the shuttle-thread and the path of the needle n and pushes the shuttle-thread outwardly, so that the said thread cannot possibly return again quickly enough to get into the path of either the beak or point I) of the shuttle S, or of the descending needle before the point of the shuttle enters the loop of needle-thread. The bridge referred to, besides co'operating with the take-up e, as described, also co-opshown, in the lower edge of the said bridge.

The bobbin-case (see Figs. 1, 4, and 5) has a bulged face 4, which nearly covers the bobbin, the said bulged face having projections or high points, as 5 and 6, to aid in spreading the loop of needle-thread while it is yet held by the beak or point of the shuttle, the said projections spreading the loop of needlethread sufficiently to readily pass and not catch upon the tension device to be described used with the bobbin-case. The face of the bobbin-case is cut away or chambered centrally (see Fig. 3) to leave a hub 8, which receives about it the movable member or disk 10 of the tensiondevice, (see Figs. 2 and 7,) the said hub being screw-threaded'to receive in it the tension-regulatingscrew 12, which, before it is passed through the said disk and into the said hub, is passed through thecover 13 and through the spiral or other spring 14 held in the space between the said disk and cover, the said screw being preferably split longitudinally so as to retain its position, and serving, when turned in .one or the'other direction, to increase or diminish the effective pressure of the said spring on thedisk 10, and consequently correspondingly effect an increase or diminution of the tension on the shuttle-thread. The cover 1.3 is provided with a tinger 16, which, when the .cover is in place, enters a space in the bulged face of the bobbincase behind the projection 2, the said projection thus aiding in keeping the shuttle-thread in place. The bobbin m, as in my said patent, surrounds a hollow stud 9 extended inwardly from the center of the bobbin-case, the said IIO sion device, already described, and in addif tion thereto I have provided the said case at its upper side with a hole, as 18, (see Figs. 5 and 3,) in line with the path of the needle, said hole enabling me to use a bobbin-case, and consequently a bobbin of greater diameter than were the said hole omitted, for in the descent of the needle its point may enter the said hole. The shuttle-race plate has pivoted upon it by a screw 20, the bobbin-case retainer 21, which is herein shown as an elbowlever struck from sheet metal, the short arm of the said lever having a concave-convex surface or made like a spoon-bowl, the con vexed surface bearing against the bulged face of the bobbin-case to keep it in the shuttle.

The outer end of this lever has a stud '22,

which enters asuitable hole, as 23, in the raceplate, to thus retain the lever in working position.

The bridge d, herein described, and the takeup e on the shuttle S may be employed to advantage in connection with the machine shown in United States Patent No. 374,662,

granted to me December 13, 1887, wherein the shuttle is moved by or in a carrier, so I do not desire to limit this invention to the par ticular means for supporting the shuttle during its oscillation, as the said means may be either the race-plate or a carrier, such as shown in the last-mentioned patent.

I claim 1. The needle-bar, its attached eye-pointed needle, the usual vibrating take-up lever for the needle-thread, the shuttle-race, the bridge (Z, and the bobbin and bobbin-case, combined with the shuttle and the fixed and rigid takeup attached directly to it, the said take-up passing with the shuttle through the loop of needle-thread and acting upon the shuttlethread, thus aiding in setting the stitch, substantially as described.

2. In a shuttle sewing-machine, the shuttledriver II, having the rearwardly-extended thread-guard h, the outer end of which is bent inwardly, as at h, substantially as shown and described, to prevent the slack of the shuttle-thread getting across the path of the needle or in the path of the point of the needle, combined with the shuttle, its bobbin, the needle, and usual operating mechanism, substantially as set forth.

3. In a sewing-machine, the shuttle race and the bridge cl, extending entirely across the upper portion of said race and fixed upon opposite sides of the said shuttle-race and having the notch 3 in its lower edge, and a longitudinal groove for the passage of the take up (2, combined with the shuttle provided with the said take-up, the bobbin-case and its arm 2, extending into the notch in said bridge, and a support for the bobbin-case, substantially as described.

4. The shuttle-race plate having a hole 23, and the lever 21, pivoted to the said plate and having a stud 22 in one arm to engage the hole in said plate and having its other arm made spoon-bowl shape, combined with a bobbin-case having a bulged face against which the bowl-shaped arm of the lever bears and against which it is held by the engagement of the stud and hole before mentioned, substantially as shown and described.

5. In a sewing-machine, the combination, with the sh uttle-race provided with the bridge (1, extending entirely across the upper part thereof and provided on its inner face with a groove, of the shuttle provided with a takeup which, in operation, extends into said groove, to operate substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PHILIP DIEHL. Witnesses:

G. W. GREGORY, O. M. CONE. 

